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virtualx-engine/doc/classes/ParticlesMaterial.xml
Hugo Locurcio b68dd2e189
Add an XML schema for documentation 
This makes it easier to spot syntax errors when editing the
class reference. The schema is referenced locally so validation
can still work offline.

Each class XML's schema conformance is also checked on GitHub Actions.
2022-02-15 00:03:31 +01:00

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<?xml version="1.0" encoding="UTF-8" ?>
<class name="ParticlesMaterial" inherits="Material" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
Particle properties for [GPUParticles3D] and [GPUParticles2D] nodes.
</brief_description>
<description>
ParticlesMaterial defines particle properties and behavior. It is used in the [code]process_material[/code] of [GPUParticles3D] and [GPUParticles2D] emitter nodes.
Some of this material's properties are applied to each particle when emitted, while others can have a [CurveTexture] applied to vary values over the lifetime of the particle.
Particle animation is available only in [GPUParticles2D]. To use it, attach a [CanvasItemMaterial], with [member CanvasItemMaterial.particles_animation] enabled, to the particles node.
</description>
<tutorials>
</tutorials>
<methods>
<method name="get_param_max" qualifiers="const">
<return type="float" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<description>
Returns the maximum value range for the given parameter.
</description>
</method>
<method name="get_param_min" qualifiers="const">
<return type="float" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<description>
Returns the minimum value range for the given parameter.
</description>
</method>
<method name="get_param_texture" qualifiers="const">
<return type="Texture2D" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<description>
Returns the [Texture2D] used by the specified parameter.
</description>
</method>
<method name="get_particle_flag" qualifiers="const">
<return type="bool" />
<argument index="0" name="particle_flag" type="int" enum="ParticlesMaterial.ParticleFlags" />
<description>
Returns [code]true[/code] if the specified particle flag is enabled. See [enum ParticleFlags] for options.
</description>
</method>
<method name="set_param_max">
<return type="void" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<argument index="1" name="value" type="float" />
<description>
Sets the maximum value range for the given parameter.
</description>
</method>
<method name="set_param_min">
<return type="void" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<argument index="1" name="value" type="float" />
<description>
Sets the minimum value range for the given parameter.
</description>
</method>
<method name="set_param_texture">
<return type="void" />
<argument index="0" name="param" type="int" enum="ParticlesMaterial.Parameter" />
<argument index="1" name="texture" type="Texture2D" />
<description>
Sets the [Texture2D] for the specified [enum Parameter].
</description>
</method>
<method name="set_particle_flag">
<return type="void" />
<argument index="0" name="particle_flag" type="int" enum="ParticlesMaterial.ParticleFlags" />
<argument index="1" name="enable" type="bool" />
<description>
If [code]true[/code], enables the specified particle flag. See [enum ParticleFlags] for options.
</description>
</method>
</methods>
<members>
<member name="angle_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's rotation will be animated along this [CurveTexture].
</member>
<member name="angle_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum angle.
</member>
<member name="angle_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum angle.
</member>
<member name="angular_velocity_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's angular velocity (rotation speed) will vary along this [CurveTexture] over its lifetime.
</member>
<member name="angular_velocity_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum initial angular velocity (rotation speed) applied to each particle in [i]degrees[/i] per second.
</member>
<member name="angular_velocity_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum initial angular velocity (rotation speed) applied to each particle in [i]degrees[/i] per second.
</member>
<member name="anim_offset_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's animation offset will vary along this [CurveTexture].
</member>
<member name="anim_offset_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum animation offset.
</member>
<member name="anim_offset_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum animation offset.
</member>
<member name="anim_speed_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's animation speed will vary along this [CurveTexture].
</member>
<member name="anim_speed_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum particle animation speed. Animation speed of [code]1[/code] means that the particles will make full [code]0[/code] to [code]1[/code] offset cycle during lifetime, [code]2[/code] means [code]2[/code] cycles etc.
With animation speed greater than [code]1[/code], remember to enable [member CanvasItemMaterial.particles_anim_loop] property if you want the animation to repeat.
</member>
<member name="anim_speed_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum particle animation speed.
</member>
<member name="attractor_interaction_enabled" type="bool" setter="set_attractor_interaction_enabled" getter="is_attractor_interaction_enabled" default="true">
True if the interaction with particle attractors is enabled.
</member>
<member name="collision_bounce" type="float" setter="set_collision_bounce" getter="get_collision_bounce" default="0.0">
Collision bouncyness.
</member>
<member name="collision_enabled" type="bool" setter="set_collision_enabled" getter="is_collision_enabled" default="false">
True if collisions are enabled for this particle system.
</member>
<member name="collision_friction" type="float" setter="set_collision_friction" getter="get_collision_friction" default="0.0">
Collision friction.
</member>
<member name="collision_use_scale" type="bool" setter="set_collision_use_scale" getter="is_collision_using_scale" default="false">
Should collision take scale into account.
</member>
<member name="color" type="Color" setter="set_color" getter="get_color" default="Color(1, 1, 1, 1)">
Each particle's initial color. If the [GPUParticles2D]'s [code]texture[/code] is defined, it will be multiplied by this color. To have particle display color in a [BaseMaterial3D] make sure to set [member BaseMaterial3D.vertex_color_use_as_albedo] to [code]true[/code].
</member>
<member name="color_initial_ramp" type="Texture2D" setter="set_color_initial_ramp" getter="get_color_initial_ramp">
Each particle's initial color will vary along this [GradientTexture1D] (multiplied with [member color]).
</member>
<member name="color_ramp" type="Texture2D" setter="set_color_ramp" getter="get_color_ramp">
Each particle's color will vary along this [GradientTexture1D] over its lifetime (multiplied with [member color]).
</member>
<member name="damping_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Damping will vary along this [CurveTexture].
</member>
<member name="damping_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
</member>
<member name="damping_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
</member>
<member name="direction" type="Vector3" setter="set_direction" getter="get_direction" default="Vector3(1, 0, 0)">
Unit vector specifying the particles' emission direction.
</member>
<member name="emission_box_extents" type="Vector3" setter="set_emission_box_extents" getter="get_emission_box_extents">
The box's extents if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_BOX].
</member>
<member name="emission_color_texture" type="Texture2D" setter="set_emission_color_texture" getter="get_emission_color_texture">
Particle color will be modulated by color determined by sampling this texture at the same point as the [member emission_point_texture].
</member>
<member name="emission_normal_texture" type="Texture2D" setter="set_emission_normal_texture" getter="get_emission_normal_texture">
Particle velocity and rotation will be set by sampling this texture at the same point as the [member emission_point_texture]. Used only in [constant EMISSION_SHAPE_DIRECTED_POINTS]. Can be created automatically from mesh or node by selecting "Create Emission Points from Mesh/Node" under the "Particles" tool in the toolbar.
</member>
<member name="emission_point_count" type="int" setter="set_emission_point_count" getter="get_emission_point_count">
The number of emission points if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_POINTS] or [constant EMISSION_SHAPE_DIRECTED_POINTS].
</member>
<member name="emission_point_texture" type="Texture2D" setter="set_emission_point_texture" getter="get_emission_point_texture">
Particles will be emitted at positions determined by sampling this texture at a random position. Used with [constant EMISSION_SHAPE_POINTS] and [constant EMISSION_SHAPE_DIRECTED_POINTS]. Can be created automatically from mesh or node by selecting "Create Emission Points from Mesh/Node" under the "Particles" tool in the toolbar.
</member>
<member name="emission_ring_axis" type="Vector3" setter="set_emission_ring_axis" getter="get_emission_ring_axis">
The axis of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_ring_height" type="float" setter="set_emission_ring_height" getter="get_emission_ring_height">
The height of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_ring_inner_radius" type="float" setter="set_emission_ring_inner_radius" getter="get_emission_ring_inner_radius">
The inner radius of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_ring_radius" type="float" setter="set_emission_ring_radius" getter="get_emission_ring_radius">
The radius of the ring when using the emitter [constant EMISSION_SHAPE_RING].
</member>
<member name="emission_shape" type="int" setter="set_emission_shape" getter="get_emission_shape" enum="ParticlesMaterial.EmissionShape" default="0">
Particles will be emitted inside this region. Use [enum EmissionShape] constants for values.
</member>
<member name="emission_sphere_radius" type="float" setter="set_emission_sphere_radius" getter="get_emission_sphere_radius">
The sphere's radius if [code]emission_shape[/code] is set to [constant EMISSION_SHAPE_SPHERE].
</member>
<member name="flatness" type="float" setter="set_flatness" getter="get_flatness" default="0.0">
Amount of [member spread] along the Y axis.
</member>
<member name="gravity" type="Vector3" setter="set_gravity" getter="get_gravity" default="Vector3(0, -9.8, 0)">
Gravity applied to every particle.
</member>
<member name="hue_variation_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's hue will vary along this [CurveTexture].
</member>
<member name="hue_variation_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum hue variation.
</member>
<member name="hue_variation_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum hue variation.
</member>
<member name="initial_velocity_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum initial velocity.
</member>
<member name="initial_velocity_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum initial velocity.
</member>
<member name="lifetime_randomness" type="float" setter="set_lifetime_randomness" getter="get_lifetime_randomness" default="0.0">
Particle lifetime randomness ratio. The lifetime will be multiplied by a value interpolated between [code]1.0[/code] and a random number less than one. For example a random ratio of [code]0.4[/code] would scale the original lifetime between [code]0.4-1.0[/code] of its original value.
</member>
<member name="linear_accel_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's linear acceleration will vary along this [CurveTexture].
</member>
<member name="linear_accel_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum linear acceleration.
</member>
<member name="linear_accel_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum linear acceleration.
</member>
<member name="orbit_velocity_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's orbital velocity will vary along this [CurveTexture].
</member>
<member name="orbit_velocity_max" type="float" setter="set_param_max" getter="get_param_max">
Maximum orbit velocity.
</member>
<member name="orbit_velocity_min" type="float" setter="set_param_min" getter="get_param_min">
Minimum orbit velocity.
</member>
<member name="particle_flag_align_y" type="bool" setter="set_particle_flag" getter="get_particle_flag" default="false">
Align Y axis of particle with the direction of its velocity.
</member>
<member name="particle_flag_disable_z" type="bool" setter="set_particle_flag" getter="get_particle_flag" default="false">
If [code]true[/code], particles will not move on the z axis.
</member>
<member name="particle_flag_rotate_y" type="bool" setter="set_particle_flag" getter="get_particle_flag" default="false">
If [code]true[/code], particles rotate around Y axis by [member angle_min].
</member>
<member name="radial_accel_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's radial acceleration will vary along this [CurveTexture].
</member>
<member name="radial_accel_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum radial acceleration.
</member>
<member name="radial_accel_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum radial acceleration.
</member>
<member name="scale_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's scale will vary along this [CurveTexture]. If a [CurveXYZTexture] is supplied instead, the scale will be separated per-axis.
</member>
<member name="scale_max" type="float" setter="set_param_max" getter="get_param_max" default="1.0">
Maximum scale.
</member>
<member name="scale_min" type="float" setter="set_param_min" getter="get_param_min" default="1.0">
Minimum scale.
</member>
<member name="spread" type="float" setter="set_spread" getter="get_spread" default="45.0">
Each particle's initial direction range from [code]+spread[/code] to [code]-spread[/code] degrees.
</member>
<member name="sub_emitter_amount_at_end" type="int" setter="set_sub_emitter_amount_at_end" getter="get_sub_emitter_amount_at_end">
</member>
<member name="sub_emitter_frequency" type="float" setter="set_sub_emitter_frequency" getter="get_sub_emitter_frequency">
</member>
<member name="sub_emitter_keep_velocity" type="bool" setter="set_sub_emitter_keep_velocity" getter="get_sub_emitter_keep_velocity" default="false">
</member>
<member name="sub_emitter_mode" type="int" setter="set_sub_emitter_mode" getter="get_sub_emitter_mode" enum="ParticlesMaterial.SubEmitterMode" default="0">
</member>
<member name="tangential_accel_curve" type="Texture2D" setter="set_param_texture" getter="get_param_texture">
Each particle's tangential acceleration will vary along this [CurveTexture].
</member>
<member name="tangential_accel_max" type="float" setter="set_param_max" getter="get_param_max" default="0.0">
Maximum tangential acceleration.
</member>
<member name="tangential_accel_min" type="float" setter="set_param_min" getter="get_param_min" default="0.0">
Minimum tangential acceleration.
</member>
</members>
<constants>
<constant name="PARAM_INITIAL_LINEAR_VELOCITY" value="0" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set initial velocity properties.
</constant>
<constant name="PARAM_ANGULAR_VELOCITY" value="1" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set angular velocity properties.
</constant>
<constant name="PARAM_ORBIT_VELOCITY" value="2" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set orbital velocity properties.
</constant>
<constant name="PARAM_LINEAR_ACCEL" value="3" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set linear acceleration properties.
</constant>
<constant name="PARAM_RADIAL_ACCEL" value="4" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set radial acceleration properties.
</constant>
<constant name="PARAM_TANGENTIAL_ACCEL" value="5" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set tangential acceleration properties.
</constant>
<constant name="PARAM_DAMPING" value="6" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set damping properties.
</constant>
<constant name="PARAM_ANGLE" value="7" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set angle properties.
</constant>
<constant name="PARAM_SCALE" value="8" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set scale properties.
</constant>
<constant name="PARAM_HUE_VARIATION" value="9" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set hue variation properties.
</constant>
<constant name="PARAM_ANIM_SPEED" value="10" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set animation speed properties.
</constant>
<constant name="PARAM_ANIM_OFFSET" value="11" enum="Parameter">
Use with [method set_param_min], [method set_param_max], and [method set_param_texture] to set animation offset properties.
</constant>
<constant name="PARAM_MAX" value="12" enum="Parameter">
Represents the size of the [enum Parameter] enum.
</constant>
<constant name="PARTICLE_FLAG_ALIGN_Y_TO_VELOCITY" value="0" enum="ParticleFlags">
Use with [method set_particle_flag] to set [member particle_flag_align_y].
</constant>
<constant name="PARTICLE_FLAG_ROTATE_Y" value="1" enum="ParticleFlags">
Use with [method set_particle_flag] to set [member particle_flag_rotate_y].
</constant>
<constant name="PARTICLE_FLAG_DISABLE_Z" value="2" enum="ParticleFlags">
Use with [method set_particle_flag] to set [member particle_flag_disable_z].
</constant>
<constant name="PARTICLE_FLAG_MAX" value="3" enum="ParticleFlags">
Represents the size of the [enum ParticleFlags] enum.
</constant>
<constant name="EMISSION_SHAPE_POINT" value="0" enum="EmissionShape">
All particles will be emitted from a single point.
</constant>
<constant name="EMISSION_SHAPE_SPHERE" value="1" enum="EmissionShape">
Particles will be emitted in the volume of a sphere.
</constant>
<constant name="EMISSION_SHAPE_BOX" value="2" enum="EmissionShape">
Particles will be emitted in the volume of a box.
</constant>
<constant name="EMISSION_SHAPE_POINTS" value="3" enum="EmissionShape">
Particles will be emitted at a position determined by sampling a random point on the [member emission_point_texture]. Particle color will be modulated by [member emission_color_texture].
</constant>
<constant name="EMISSION_SHAPE_DIRECTED_POINTS" value="4" enum="EmissionShape">
Particles will be emitted at a position determined by sampling a random point on the [member emission_point_texture]. Particle velocity and rotation will be set based on [member emission_normal_texture]. Particle color will be modulated by [member emission_color_texture].
</constant>
<constant name="EMISSION_SHAPE_RING" value="5" enum="EmissionShape">
Particles will be emitted in a ring or cylinder.
</constant>
<constant name="EMISSION_SHAPE_MAX" value="6" enum="EmissionShape">
Represents the size of the [enum EmissionShape] enum.
</constant>
<constant name="SUB_EMITTER_DISABLED" value="0" enum="SubEmitterMode">
</constant>
<constant name="SUB_EMITTER_CONSTANT" value="1" enum="SubEmitterMode">
</constant>
<constant name="SUB_EMITTER_AT_END" value="2" enum="SubEmitterMode">
</constant>
<constant name="SUB_EMITTER_AT_COLLISION" value="3" enum="SubEmitterMode">
</constant>
<constant name="SUB_EMITTER_MAX" value="4" enum="SubEmitterMode">
</constant>
</constants>
</class>
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